Altun Mountains Tunnel on Golmud-Korla railway line dug through
China #Qinghai province and Xinjiang #Uygur autonomous region conection
http://english.www.gov.cn/news/photos/201911/20/content_WS5dd49455c6d0bcf8c4c17767.html
#China #Tunnel #Technology
cover tunnel photo by: Matt Brown from London, England / CC BY
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